Controllable emission wavelength of QDs allows making laser at any colors. Quantum Dot is a promising materials for low threshold and temperature insentive laser.
A white Light Emitting Diode (LED) is made from nanocomposite materials which is incorporation of color-tunable colloidal quantum dot into nanoporous Gallium Nitride scaffold adjacent to active area (quantum well) of blue LED.
II-VI semiconductor colloidal Quantum Dots (QDs) are highly fluorescent nanocrystals which are prepared through organometallic synthesis in solution phase. They have been widely used in practice as fluorescent labels in many bio-imaging applications. Quasi-zero dimensional Wannier exciton states arise in QDs as a result of the strong quantum confinement which makes QDs be very interesting and unique: Just change the size of QDs (no need to change material), emission colors will change. Bigger QDs will emit redder light and smaller QDs will emit bluer.
Wireless Recording for Neuroprosthetic Application
We have built a wireless implantable microelectronic device for transmitting cortical signals transcutaneously. The device is aimed at interfacing a microelectrode array cortical to an external computer for neural control applications. Our implantable microsystem enables presently 16-channel broadband neural recording in a non-human primate brain by converting these signals to a digital stream of infrared light pulses for transmission through the skin.